id:A133579 - OEIS Search Results

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a(n)=a(n-1)/gcd(n,a(n-1)) if gcd(n,a(n-1)) divides a(n-1), else a(n)=3*a(n-1).

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1, 1, 3, 1, 3, 3, 9, 27, 81, 9, 27, 81, 27, 81, 243, 81, 243, 729, 81, 243, 729, 243, 729, 2187, 729, 2187, 6561, 243, 729, 2187, 729, 2187, 6561, 2187, 6561, 19683, 2187, 6561, 19683, 6561, 19683, 59049, 19683, 59049, 177147, 59049, 177147, 531441 (list; graph; listen)

	OFFSET	`1,3`
	CROSSREFS	`Cf. A133058.` `Sequence in context: A005885 A061892 A038573 this_sequence A098743 A130560 A088105` `Adjacent sequences: A133576 A133577 A133578 this_sequence A133580 A133581 A133582`
	KEYWORD	`nonn`
	AUTHOR	`Ctibor O. ZIZKA (ctibor.zizka(AT)seznam.cz), Dec 26 2007`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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